[Class] Polycystinea Ehrenberg, 1838 - polycystines see Superclass Polycystinia Ehrenberg, 1838
   Order Spumellaria Ehrenberg, 1875 see Class Spumellaria Ehrenberg, 1875
     Family Spongodiscidae Haeckel, 1862
       Genus Circodiscus Kozlova, 1972
         1 †Circodiscus circularis (Clark & Campbell, 1942)
         2 †Circodiscus ellipticus (Stöhr, 1880)
         3 Circodiscus microporus (Stöhr, 1880)